Abstract
There were two procedures about surface failure in rolling contact fatigue (RCF): wear process and crack propagation. To find out the failure pattern in polyphenylenesulphide (PPS) polymer thrust bearings under water condition, RCF tests were introduced. In our previous study, the relationship between wear loss, rotation speed and thrust load of polymer bearings under RCF in water was investigated; it was concluded that the main reason for PPS polymer thrust bearings failure in water was flaking due to surface crack propagation. In this study, the detailed surface profiles under heavy load and crack observation were made. Furthermore, effect of machining conditions on flaking was investigated. It is concluded that flaking due to crack propagation was responsible to fatigue failure of PPS polymer thrust bearings under water condition, and slower feedrate in race process improves life time of PPS bearings.
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